<template>
  <PageWrapper title="二维码组件使用示例">
    <div class="flex flex-wrap">
      <CollapseContainer
        title="基础示例"
        :canExpan="true"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode :value="qrCodeUrl" />
      </CollapseContainer>

      <CollapseContainer
        title="渲染成img标签示例"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode :value="qrCodeUrl" tag="img" />
      </CollapseContainer>

      <CollapseContainer
        title="配置样式示例"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode
          :value="qrCodeUrl"
          :options="{
            color: { dark: '#55D187' },
          }"
        />
      </CollapseContainer>

      <CollapseContainer
        title="本地logo示例"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode :value="qrCodeUrl" :logo="LogoImg" />
      </CollapseContainer>

      <CollapseContainer
        title="在线logo示例"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode
          :value="qrCodeUrl"
          logo="https://vebn.oss-cn-beijing.aliyuncs.com/vben/logo.png"
          :options="{
            color: { dark: '#55D187' },
          }"
        />
      </CollapseContainer>

      <CollapseContainer
        title="logo配置示例"
        class="mb-6 text-center qrcode-demo-item"
      >
        <QrCode
          :value="qrCodeUrl"
          :logo="{
            src: 'https://vebn.oss-cn-beijing.aliyuncs.com/vben/logo.png',
            logoSize: 0.2,
            borderSize: 0.05,
            borderRadius: 50,
            bgColor: 'blue',
          }"
        />
      </CollapseContainer>

      <CollapseContainer title="下载示例" class="text-center qrcode-demo-item">
        <QrCode :value="qrCodeUrl" ref="qrRef" :logo="LogoImg" />
        <a-button class="mb-2" type="primary" @click="download">
          下载
        </a-button>
        <div class="msg">
          (在线logo会导致图片跨域，需要下载图片需要自行解决跨域问题)
        </div>
      </CollapseContainer>

      <CollapseContainer
        title="配置大小示例"
        class="text-center qrcode-demo-item"
      >
        <QrCode :value="qrCodeUrl" :width="300" />
      </CollapseContainer>

      <CollapseContainer
        title="扩展绘制示例"
        class="text-center qrcode-demo-item"
      >
        <QrCode
          :value="qrCodeUrl"
          :width="200"
          :options="{ margin: 5 }"
          ref="qrDiyRef"
          :logo="LogoImg"
          @done="onQrcodeDone"
        />
        <a-button class="mb-2" type="primary" @click="downloadDiy">
          下载
        </a-button>
        <div class="msg">要进行扩展绘制则不能将tag设为img</div>
      </CollapseContainer>
    </div>
  </PageWrapper>
</template>
<script lang="ts">
import { defineComponent, ref, unref } from 'vue'
import { QrCode, QrCodeActionType } from '@components/common'
import LogoImg from '@/assets/images/logo.png'
import { CollapseContainer } from '@/components/container'
import { PageWrapper } from '@/components/page'

const qrCodeUrl = 'https://www.vvbin.cn'
export default defineComponent({
  components: { CollapseContainer, QrCode, PageWrapper },
  setup() {
    const qrRef = ref<Nullable<QrCodeActionType>>(null)
    const qrDiyRef = ref<Nullable<QrCodeActionType>>(null)
    function download() {
      const qrEl = unref(qrRef)
      if (!qrEl) return
      qrEl.download('文件名')
    }
    function downloadDiy() {
      const qrEl = unref(qrDiyRef)
      if (!qrEl) return
      qrEl.download('Qrcode')
    }

    function onQrcodeDone({ ctx }: any) {
      if (ctx instanceof CanvasRenderingContext2D) {
        // 额外绘制
        ctx.fillStyle = 'black'
        ctx.font = '16px "微软雅黑"'
        ctx.textBaseline = 'bottom'
        ctx.textAlign = 'center'
        ctx.fillText('你帅你先扫', 100, 195, 200)
      }
    }
    return {
      onQrcodeDone,
      qrCodeUrl,
      LogoImg,
      download,
      downloadDiy,
      qrRef,
      qrDiyRef,
    }
  },
})
</script>
<style scoped>
.qrcode-demo-item {
  width: 30%;
  margin-right: 1%;
}
</style>
